Resistance Investigation Board Type_Round End this large earthworm dissection model

this large earthworm dissection model reveals segmentation

converting solar radiation to measurable thermal energy on an 18-inch-tall stand

Zinc-plated rectangular steel bar-magnet pair packaged with keepers that bridge the poles in storage

Six-lens optics set of three double-convex and three double-concave glass lenses with ground beveled edges

supporting optical components

Resistance Investigation Board Type_Round End this large earthworm dissection modelCompact 42 cm resistance investigation board, the lower cost benchtop alternative to the full meter resistivity boards for quantitative R = rho*L A and material comparison investigations.